/*
 * jQuery Easing v1.3 - http://gsgd.co.uk/sandbox/jquery/easing/
 *
 * Uses the built in easing capabilities added In jQuery 1.1
 * to offer multiple easing options
 *
 * TERMS OF USE - jQuery Easing
 *
 * Open source under the BSD License.
 *
 * Copyright © 2008 George McGinley Smith
 * All rights reserved.
 */

define('easing',function(require, exports, module) {
	var jQuery = require('jquery');
	
	jQuery.easing['jswing'] = jQuery.easing['swing'];

	jQuery.extend(jQuery.easing, {
		def: 'easeOutQuad',
		swing: function(x, t, b, c, d) {
			//alert(jQuery.easing.default);
			return jQuery.easing[jQuery.easing.def](x, t, b, c, d);
		},
		easeInQuad: function(x, t, b, c, d) {
			return c * (t /= d) * t + b;
		},
		easeOutQuad: function(x, t, b, c, d) {
			return -c * (t /= d) * (t - 2) + b;
		},
		easeInOutQuad: function(x, t, b, c, d) {
			if ((t /= d / 2) < 1) return c / 2 * t * t + b;
			return -c / 2 * ((--t) * (t - 2) - 1) + b;
		},
		easeInCubic: function(x, t, b, c, d) {
			return c * (t /= d) * t * t + b;
		},
		easeOutCubic: function(x, t, b, c, d) {
			return c * ((t = t / d - 1) * t * t + 1) + b;
		},
		easeInOutCubic: function(x, t, b, c, d) {
			if ((t /= d / 2) < 1) return c / 2 * t * t * t + b;
			return c / 2 * ((t -= 2) * t * t + 2) + b;
		},
		easeInQuart: function(x, t, b, c, d) {
			return c * (t /= d) * t * t * t + b;
		},
		easeOutQuart: function(x, t, b, c, d) {
			return -c * ((t = t / d - 1) * t * t * t - 1) + b;
		},
		easeInOutQuart: function(x, t, b, c, d) {
			if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b;
			return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
		},
		easeInQuint: function(x, t, b, c, d) {
			return c * (t /= d) * t * t * t * t + b;
		},
		easeOutQuint: function(x, t, b, c, d) {
			return c * ((t = t / d - 1) * t * t * t * t + 1) + b;
		},
		easeInOutQuint: function(x, t, b, c, d) {
			if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
			return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
		},
		easeInSine: function(x, t, b, c, d) {
			return -c * Math.cos(t / d * (Math.PI / 2)) + c + b;
		},
		easeOutSine: function(x, t, b, c, d) {
			return c * Math.sin(t / d * (Math.PI / 2)) + b;
		},
		easeInOutSine: function(x, t, b, c, d) {
			return -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b;
		},
		easeInExpo: function(x, t, b, c, d) {
			return (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b;
		},
		easeOutExpo: function(x, t, b, c, d) {
			return (t == d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
		},
		easeInOutExpo: function(x, t, b, c, d) {
			if (t == 0) return b;
			if (t == d) return b + c;
			if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b;
			return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b;
		},
		easeInCirc: function(x, t, b, c, d) {
			return -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b;
		},
		easeOutCirc: function(x, t, b, c, d) {
			return c * Math.sqrt(1 - (t = t / d - 1) * t) + b;
		},
		easeInOutCirc: function(x, t, b, c, d) {
			if ((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b;
			return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b;
		},
		easeInElastic: function(x, t, b, c, d) {
			var s = 1.70158;
			var p = 0;
			var a = c;
			if (t == 0) return b;
			if ((t /= d) == 1) return b + c;
			if (!p) p = d * .3;
			if (a < Math.abs(c)) {
				a = c;
				var s = p / 4;
			} else var s = p / (2 * Math.PI) * Math.asin(c / a);
			return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
		},
		easeOutElastic: function(x, t, b, c, d) {
			var s = 1.70158;
			var p = 0;
			var a = c;
			if (t == 0) return b;
			if ((t /= d) == 1) return b + c;
			if (!p) p = d * .3;
			if (a < Math.abs(c)) {
				a = c;
				var s = p / 4;
			} else var s = p / (2 * Math.PI) * Math.asin(c / a);
			return a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b;
		},
		easeInOutElastic: function(x, t, b, c, d) {
			var s = 1.70158;
			var p = 0;
			var a = c;
			if (t == 0) return b;
			if ((t /= d / 2) == 2) return b + c;
			if (!p) p = d * (.3 * 1.5);
			if (a < Math.abs(c)) {
				a = c;
				var s = p / 4;
			} else var s = p / (2 * Math.PI) * Math.asin(c / a);
			if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b;
			return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b;
		},
		easeInBack: function(x, t, b, c, d, s) {
			if (s == undefined) s = 1.70158;
			return c * (t /= d) * t * ((s + 1) * t - s) + b;
		},
		easeOutBack: function(x, t, b, c, d, s) {
			if (s == undefined) s = 1.70158;
			return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b;
		},
		easeInOutBack: function(x, t, b, c, d, s) {
			if (s == undefined) s = 1.70158;
			if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b;
			return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b;
		},
		easeInBounce: function(x, t, b, c, d) {
			return c - jQuery.easing.easeOutBounce(x, d - t, 0, c, d) + b;
		},
		easeOutBounce: function(x, t, b, c, d) {
			if ((t /= d) < (1 / 2.75)) {
				return c * (7.5625 * t * t) + b;
			} else if (t < (2 / 2.75)) {
				return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b;
			} else if (t < (2.5 / 2.75)) {
				return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b;
			} else {
				return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b;
			}
		},
		easeInOutBounce: function(x, t, b, c, d) {
			if (t < d / 2) return jQuery.easing.easeInBounce(x, t * 2, 0, c, d) * .5 + b;
			return jQuery.easing.easeOutBounce(x, t * 2 - d, 0, c, d) * .5 + c * .5 + b;
		}
	});
});